Meaning of O' in English

O'

preposition

also o ə

Etymology: in sense 1 from Middle English o, o-, alteration of on; in sense 2 from Middle English o, o-, alteration of of

1. chiefly dialect : on

2. : of — now chiefly in dialect use except in a few set phrases (as o'clock )

Webster's New International English Dictionary.      Новый международный словарь английского языка Webster.